The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X260-30S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 30 mm range without swapping the cylinder. Ø40mm bore, 260mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ40X260-30S is a double-acting, single-rod pneumatic cylinder that puts stroke-end fine-tuning directly on the machine. Its rear-cap adjusting screw provides up to 30 mm of retraction adjustment from the nominal 260 mm stroke, letting you dial in the exact stopping position without adding external hard stops or swapping the cylinder body.
Built around a 40 mm bore with a 16 mm piston rod and PT1/4 ports, this unit delivers 628 N of push force at 0.5 MPa and up to 1130 N at 0.9 MPa. The integrated magnet allows direct mounting of CMSG/DMSG/EMSG sensors on the tie-rod barrel for reliable end-of-stroke detection. With a body length of 185 mm plus stroke and a 21 mm air cushion, it fits neatly into machinery where commissioning trials or format changeovers demand quick, repeatable stroke adjustments.
| Model | Airtac SCJ40 Standard Cylinder SCJ40X260-30S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 260 mm |
| Stroke adjustment | Up to 30 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT1/4 |
| Rod thread | M12×1.25 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 21 mm |
| Max stroke | Up to 1200 mm |
Specifications follow the official AirTAC SCJ (adjustable-stroke) datasheet. The rear adjusting screw sets the stroke end position; force is the same as the equivalent single-rod SC bore. Confirm against the product label before installation. Thread options: PT (standard) / G.
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
SCJ is single-rod, so force matches the equivalent SC bore: push uses the full bore area, pull subtracts the rod area. Actual usable force is lower than theoretical due to friction and back-pressure; size with a safety margin.
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×260 | Nominal (maximum) stroke length in mm. |
| -30 | Adjustable-stroke range in mm (options 10/20/30/40/50/75/100). |
| -S | Optional built-in magnet for sensor position sensing. |
Related types: SC (single rod, fixed stroke), SCD (double rod), SCT (multi-position). SCJ mounting: Basic, FA, LB, TC, TCM1. Seals: TPU standard / H = Viton / N = NBR. Thread: blank = PT, G = G thread.
Fine-tune the retracted stroke end by up to 30 mm during machine bring-up, eliminating the need to shim or reposition the cylinder mount to hit the exact pick-and-place location.
Adjust the stop position quickly when a packaging line switches between product sizes. The rear screw lets an operator set a new box-width stop in seconds without tools.
Compensate for gripper pad or tooling wear over time by slightly reducing the stroke end with the adjusting screw, maintaining consistent clamping pressure without replacing parts.
Choose the SCJ40 bore when your application needs roughly 628 N of push at standard plant air. If you require more force, stepping up to the SCJ50 delivers 982 N push at the same 0.5 MPa. For applications where the stroke is fixed and never needs field adjustment, the standard SC40 cylinder offers the same force and mounting footprint without the adjusting mechanism. This SCJ40X260-30S is a direct replacement for another AirTAC SCJ adjustable-stroke cylinder of identical bore, nominal stroke, 30 mm adjust range, PT port thread, and magnetic piston. At a 260 mm stroke, rod deflection under side load is minimal, but for any off-axis force, pair the cylinder with an external guide rail or switch to a guided cylinder series.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 628 N and the pull force is 528 N. The maximum operating push force at 0.9 MPa is 1130 N. Because it is a single-rod cylinder, the push force is always greater than the pull force.
Yes, if you need field-adjustable stroke. The SCJ40X260-30S shares the same 40 mm bore, rod diameter, and mounting accessories as the SC series. Just ensure your machine has clearance for the rear adjusting screw and that the 30 mm adjustment range covers your stroke variation.
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